厌氧条件下生物铁泥中铁氨氧化现象探究  

Insight into Feammox of Bio-ferric Sludge Under Anaerobic Condition

作　　者：俞小军[1] 杨珍妮 张莉红[1,2,3] 陈新娟 冯娟娟 王亚娥[1] 李杰[1,2,3] YU Xiaojun;YANG Zhenni;ZHANG Lihong;CHEN Xinjuan;FENG Juanjuan;WANG Ya'e;LI Jie(School of Environmrntal and Municipal Engineering.Lanzhou Jiaotong University,Lanzhou 730070.China;Gansu Membrane Scienceand Technology Research Institute Co.,dzhou 730020 China;Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province,Lanzhou 730020,China)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]甘肃省膜科学技术研究院有限公司,甘肃兰州730020 [3]甘肃省非常规水资源化利用技术重点实验室,甘肃兰州730020

出　　处：《环境科学与技术》2022年第3期156-162,共7页Environmental Science & Technology

基　　金：国家自然科学基金(51768032)。

摘　　要：文章采用经过厌氧预处理的生物铁泥作为接种污泥,以氨氮和三价铁为主要营养源,探究在厌氧条件下生物铁泥中的铁氨氧化过程及其影响因素。结果表明:实验组出现了明显的铁氨氧化现象,NH;去除率为89.33%,伴随NH;去除产生的Fe(Ⅱ)浓度最高达到了751.16 mg/L,其氨氮去除率和Fe(Ⅱ)浓度远远高于接种生物铁泥但未投加三价铁的对照组B,对照组B氨氮去除率和Fe(Ⅱ)浓度最后分别仅为26.03%和257.8 mg/L,而只投加三价铁的对照组A未出现NH;的去除和Fe(Ⅲ)的还原。各影响因素实验中NH;出水浓度的对数值基本都与其反应时间符合一级衰减动力学模式,其模型拟合校正系数R;在0.784~0.971之间。To investigate the process of Feammox and its influencing factors under anaerobic condition,a laboratory experiment was carried out with ammonia nitrogen and ferric iron that after being anaerobically pre-treated were used as main nutrient sources to feed the bio-ferric sludge.The experiment showed that apparent iron reduction occurred as far as the experimental groups and NH;removal rate was 89.33%,and Fe(Ⅱ) produced accompanying with NH;removal the concentration reaching as high as 751.16 mg/L,the ammonia nitrogen removal rate and Fe(Ⅱ) concentration were much higher than the control group B,which had been inoculated with bio-ferric sludge but without Fe(Ⅲ) added in.As for control group B,ammonia nitrogen removal rate was merely 26.03%and Fe(Ⅱ) concentration 257.8 mg/L.However,neither NH;removal nor Fe(Ⅲ) reduction occurred in control group A,into which only Fe(Ⅲ) had been added.Besides,the logarithm of NH;concentrations,which was one of the factors that influenced experiments in the treated effluent,basically conformed to the first-order attenuation kinetic model,and its reaction time,and its model fitting correction coefficient (R~2) ranged from 0.784 to 0.971.

关 键 词：铁氨氧化 生物铁泥 脱氮 影响因素 

分 类 号：X703[环境科学与工程—环境工程]